// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 13.6.4.13
description: >
    Iterators should be closed via their `return` method when iteration is
    interrupted via a `break` statement.
features: [Symbol.iterator]
---*/

function Test() {
    var startedCount = 0;
    var returnCount = 0;
    var iterationCount = 0;
    var iterable = {};

    iterable[Symbol.iterator] = function() {
      return {
        next: function() {
          startedCount += 1;
          return { done: false, value: null };
        },
        return: function() {
          returnCount += 1;
          return {};
        }
      };
    };

    for (var x of iterable) {
      assert.sameValue(
        startedCount, 1, 'Value is retrieved'
      );
      assert.sameValue(
        returnCount, 0, 'Iterator is not closed'
      );
      iterationCount += 1;
      break;
    }

    assert.sameValue(
      startedCount, 1, 'Iterator does not restart following interruption'
    );
    assert.sameValue(iterationCount, 1, 'A single iteration occurs');
    assert.sameValue(
      returnCount, 1, 'Iterator is closed after `break` statement'
    );
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
